Add a safe API for creating ASCII-only strings

src/factory.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 186 matching lines @@
 
 
 Handle<String> Factory::NewStringFromAscii(Vector<const char> string,
                                            PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateStringFromOneByte(string, pretenure),
       String);
 }
 
+
+Handle<String> Factory::NewStringFromAsciiSafe(Vector<const char> string,
+                                           PretenureFlag pretenure) {
+  CALL_HEAP_FUNCTION(
+      isolate(),
+      isolate()->heap()->AllocateStringFromAsciiSafe(string, pretenure),
+      String);
+}
+
+
 Handle<String> Factory::NewStringFromUtf8(Vector<const char> string,
                                           PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateStringFromUtf8(string, pretenure),
       String);
 }
 
 
 Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string,
@@ skipping 1226 matching lines @@
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return Handle<Object>(value
                         ? isolate()->heap()->true_value()
                         : isolate()->heap()->false_value());
 }
 
 
 } }  // namespace v8::internal